Summary
The paper discusses the design and implementation of a distributed control system for the control of printed circuit board(PCB) machining process. The system involves two main hierarchical levels. These are (a) Board program development and machining scheduling and (b) command interpretation and machine control. Implementation, of these levels a re discretely made on IBM compatible PC and single chip controller (Intel 8751) respectively.
Board programming is made interactive supported by application oriented graphic facilities. Two main approaches are implemented.Programming by teaching and use of conventional high level programming. Part program knowledge accumulation is made available within the programming system. The high level application commands that are in the form of linear or circular cutting or drilling cycles are interpreted on the single chip microcontroller. The information is then expanded into a set of discrete coordinated linear motions. Execution of these linear motions are implemented using trapazoidal velocity profile based on driving the motors to its velocity limits with normalized positioning time.
The resulted system has been tested on the Relnematic CNC 100 X PCB machining table. The use of PC provides efficient man-machine interac -tion and supports modular software development and knowledge accumulation. The microcontroller allows for compact and economic design with real time performance that approaches contineous coordinated motion execution of better than 10K pulse/sec.
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© 1990 Department of Mechanical Engineering, University of Manchester Institute of Science and Technology
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AL-Anbuky, A.H., AL-Yasiri, A.A. (1990). An Integrated Interactive Cap/Cam System for PCB Machining. In: Davies, B.J. (eds) Proceedings of the Twenty-eighth International. Palgrave, London. https://doi.org/10.1007/978-1-349-10890-9_23
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DOI: https://doi.org/10.1007/978-1-349-10890-9_23
Publisher Name: Palgrave, London
Print ISBN: 978-1-349-10892-3
Online ISBN: 978-1-349-10890-9
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